This antenna was just released to us and provides truckers and RV owners with a much better alternative to the standard car antenna. This antenna not only provides a better signal but is much more durable and designed to be used all the time and withstand the abuse that large amounts of driving does to an antenna. This antenna is designed to be installed on the mirrors long-haul trucks and RV's to provide the best of reception. For best performance, the black antenna housing at the top of the mast should be installed above any other truck parts for an unobstructed view of the sky in all directions with a clearance of 20 degrees. This antenna is designed for single antenna lead SIRIUS and XM Satellite Radio receivers. This antenna is compatible with all single lead SIRIUS and XM Radio receivers. Please see the list below for a complete list of compatible receivers.